She Is Afraid Of Intimacy & Attachment?

I (25 M) have been friends with (25 F) for over two years now. It wasn’t until the beginning of this year did we really start to become close with all the negativity in our lives drawing us closer together. She was dating one of her best friends since childhood for 7 months before she found out in May that he was sleeping with his ex the entire time they were together and just using her for sexual pleasure. It was the last time she was cheated on since her ex fiancé left her for her best friend about five years ago. That event scarred her for life and it’s almost like this event reopened those scars. It has been a month and a half now since she’s found out everything about her ex.

We get along absolutely great, we talk for hours every night, we find some kind of activity such as gaming or movie watching over the phone every night, we make multiple plans every week together but at the same time I can tell she can be withdrawn. As we got closer we started cuddling a lot more, sleeping in the same bed together, she will randomly wrap her arms around me or lay her head on me but the other half of the time if I try to initiate some of these things she will draw back immediately or I can tell it bothers her or sometimes she will even get quiet. She told me half the time she absolutely loves being close to me and half the time she wants to crawl out of her skin when there’s any kind of intimacy. She says it has nothing to do with me and she doesn’t want me to leave or think it’s my fault and that she doesn’t know why she will feel this way randomly.

Has anyone else experienced something similar to this? I feel like I’m playing with fire when I’m around her because I don’t know how she will react to me in general. She says she appreciates my patience and understanding, and I really really really like this girl, but I’m just confused and don’t know how to proceed with this.